Siemens Mendix SAML
Siemens Mendix SAML module has a vulnerability allowing account hijacking.
A critical vulnerability (CVE-2026-80465) has been identified in Siemens' Mendix SAML module, potentially allowing unauthenticated remote attackers to hijack accounts in specific Single Sign-On (SSO) configurations. The flaw stems from an improper validation of the SAML response signature. Siemens has released updated versions of the Mendix SAML module to address this issue and strongly recommends users update to the latest versions.
AI summary of the linked source. Not reviewed by an editor. How this works
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The lesson from this incident
Full lessonA critical vulnerability in Siemens' Mendix SAML module arises from improper validation of SAML response signatures, allowing unauthenticated remote attackers to hijack user accounts in SSO-enabled environments. SAML signature validation is a foundational security control — when bypassed, attackers can forge authentication assertions and impersonate any user, including administrators, without valid credentials. This class of vulnerability is particularly dangerous because it undermines the entire trust model of federated identity systems. Organizations relying on SSO for centralized access control are especially exposed, as a single exploit can cascade across all integrated applications. Siemens has issued patched versions, making rapid deployment the most critical immediate action.
What helps against this
How we list vendors
- Phishing-resistant MFA
A stolen password, or a user who taps Approve on a push prompt, is no longer enough to log in.
- Identity threat detection and response (ITDR)
Attackers who log in with real, stolen credentials get noticed.
- Automated patch management
Known holes get closed in days, not months.
Indicators of Compromise
Extracted by AI from the linked source. Not reviewed by an editor. How this works
- cve — CVE-2026-80465